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प्रश्न
Group 1 and 2 : s block : : group 13 and 18 : _______
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उत्तर
Group 1 and 2 : s block : : group 13 and 18 : p Block
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संबंधित प्रश्न
Fill in the blank:
The modern periodic table consists of ……………. periods.
How does the tendency of elements to gain electrons change as we move from left to right in a period? State the reason of this change.
Name the scientist who first of all showed that atomic number of an element is a more fundamental property than its atomic mass.
Give two example of group 18 elements.
Explain why, the noble gases are placed in a separate group.
The three elements having chemical symbols of Si, B and Ge are:
(a) all metals
(b) all non-metals
(c) all metalloids
(d) Si is metalloid, B is metal and Ge is non-metal
Consider the following elements:
Na, Ca, Al, K, Mg, Li
Which of these elements belong to the same group of the periodic table?
Which element has the electronic configuration 2, 8, 2?
How does the chemical reactivity of the halogens vary on going in group 17 of the periodic table?
State whether the following statement is true or false:
On going down in a group of the periodic table, the number of valence electrons increases.
Define:
Periodic table
Name the metals in the first twenty elements.
Name the type of elements which have outermost shell incomplete.
State the modern periodic law.
Name and state the following with reference to the elements of the first three periods of the periodic table.
A covalent compound formed by an element in period 2 and a halogen.
Give the symbol and valency of the following element and radical.
Bicarbonate
Give the symbol and valency of the following element and radical.
Bisulphate
Give the chemical formula of calcium phosphate
Compare Modern Periodic Law with Mendeleev's Periodic Law.
Mendeleev's periodic table : atomic mass : : Modern periodic table : _______
Group 13 to 18 : p block : : _______ : d block
The modern periodic table has 1 to 7 periods.
To the left of the zig-zag line in the periodic table are the metal elements.
In the modern periodic table, the positions of 1 to 20 elements are shown here. Identify the elements A and B. Write their atomic number.
An X element with atomic number 11 and Y element with atomic number 13 belongs to the third period in the modern periodic table. With this information, give the answers of the below questions.
- Which element has more metallic character from these two elements?
- What is the valency of each X and Y elements?
- Atom size of Y element is smaller than atom size of X element. Explain.
Noble gases belong to______ group of the periodic table.
Element ‘X’ forms a chloride with the formula XCl2, which is solid with a high melting point. X would most likely be in the same group of the periodic table as: ______
The element which has the least tendency to lose electrons is ______
Which of the given elements A, B, C, D and E with atomic number 2, 3, 7, 10 and 30 respectively belong to the same period?
Which one of the following elements exhibit maximum number of valence electrons?
The element with atomic number 14 is hard and forms acidic oxide and a covalent halide. To which of the following categories does the element belong?
Choose an element from period 3 of modern periodic table that matches the description given below in instance. Give a reason for your choice.
It has same valency as Lithium.
The maximum number of electrons that can be accommodated in s, p,d, and f subshells are ______.
Spot the error:
The elements of group 13 are called the carbon family.
A part of modern periodic table is given below. On its basis, answer the following questions:
| Group No. → | 1 | 2 | 13 | 14 | 15 | 16 | 17 | 18 |
| Period ↓ | ||||||||
| 2 | A | B | ||||||
| 3 | E | D | F | C |
Which of the element is a Metalloid?
Define periods of modern periodic table.
Name the following metal:
A metal present in period 3, group 1 of the periodic table.
